email/webmail solution

[usernamenumber]

This requires two components, both in-progress:

• Deployment of an MTA, IMAP server, and webmail interface. Currently being worked on in usernamenumber/webmail
• User signup mechanism that creates a Django/edx user and a local account for email. Currently being worked on in usernamenumber/accounts. This uses a system I'm calling "handoff", where Django drops a JSON file describing the user into a directory that is watched by incron. When a file is added to, removed from, or modified in this directory, incron immediately runs a script (as root) that does the corresponding action for the user described in the file. This allows for actions that require root without running Django with excessive privileges, having it execute sudo commands, etc. Possibly overkill, but shouldn't take much more work to have it ready, and it could have broader applications?